Marginal printing plates



May 29, 11923.'

L. A. SCHMIDT MARGINAL PRINTING PLATE Filed Dec; l, 1921 2 Sheets-Sheet 53 WVNTR Patented May 29,

LOUIS SCHMIDT, 0F NEW YORK, N. Y., ASSIGNOR TO R. HOE AND CO., OF NET YORK, N. Y., A CORPORATION 0F NEW YORK.

MARGINAL PRINTING PLATES.

Application led December 1, 1921. Serial No. 519,042.

.T 0 all whom t may concern.'

Be it known that I, LoUrs A. SCHMIDT, a citizen of the United States, residing at New York city, county of IIings, and State of New York, have invented certain new and useful Improvements in Marginal Printing Plates, fully described and represented in the following speciiication and the accompanying drawings, forming a part of the same.

This invention relates to certain improvements in devices for marginal printing, that is devices whereby the margin space usually formed between two printing plates may be utilized for printing.

It has been proposed to utilize this space by casting two adjacent plates so that they have portions projecting across this marginal space, the surface of the projecting portions carrying printing matter of any desired character. In thus utilizing this margin space it was necessary to cast one or both of the plates with this additional printing surface, and this required a special construction and arrangement of the casting box and special form of matrix. While this proposed method is efficient particularly where a large number of similar plates are to be cast, it is often desirable that this marginal space may be utilized for printing without special arrangement of the casting box and matrix, so that the two main plates may be cast as usual and the marginal printing surface formed separately from the plates.

lIt is the especial object of the present invention to produce a construction for marginal printing in which there is provided what may be termed a supplemental plate, this plate being narrower than the main plates and having a printing surface extending across the margin space, or so much thereof as it may be desired to utilize, means being provided for locking this supplemental plate in position between the main printingv plates, this construction doing away with the necessity of specially casting one or more of the main printing plates.

A further object of the invention is to produce a simple construction for locking this supplemental plate in position, and a construction in which preferably the supplemental plate is locked up by the same mechanism which is employed for locking up the main plates.

.on the other side of the cylinder.

With these and other objects not specifically referred to, the invention consists in certain novel parts and combinations, a detailed description of which will be given in connection with the accompanying drawings, and the novel features then pointed cut in the claims hereunto annexed.

In these drawings Figure l is a broken longitudinal section of a plate support showing a pair of main plates with the margin space therebetween occupied by a supplemental plate.

Figure 2 is a sectional view on an enlarged scale, showing the edges of the two main plates and the supplemental plate, the parts being shown in unlocked position.

Figure 3 is a similar view showing the parts locked.

Figure 4 is a view of a modified form of construction in which only a portion of the margin space is to be utilized.

Figure 5 is a sectional end View of a modiiied construction for effecting the locking up of the supplemental plate.

Figure 6 is a similar View with the parts in locked position.

Figure 7 is a detail sectional view taken on line 7-7 of Fig. 6; and

Figure 8 is a detail sectional view taken on line 8 8 of Fig. 6.

Referring now to these drawings, l indicates a plate support which may be in the form of a cylinder. In the particular construction illustrated this cylinder is capacitated to carry three or more plates wide, and is provided with the usual plate stop or bar 2, against which the inner edges of the two main plates abut and against which they are locked. It will be understood, however, that other forms of support other than -a cylinder may be employed if desired, the cylinder having been shown for convenience.

In the construction illustrated, two or more plates are shown in Fig. l, full width, these .plates being marked 3 and 4l, it being understood that if desired, the mechanism hereinafter referred to will be duplicated These two main printing plates 3, I are of the usual size and are arranged on the cylinder end to end with a margin space, indicated in vFig. 2 by the numeral 5, left between the plates. .l

Referring first to the construction illuslll() trated in Figs. 1 to 3, there is .provided a supplemental plate. 6, which is narrower than the main plates, and is provided with a printing surface which extends substantially across the margin space when the Figs. 1 to 3, is locked position when the.- main plates are locked. `While various spe-y cific constructions may be provided for effecting this,`1n the particular-construction illustrated, the supplemental plate is castl with a central ridge 0rl projection 7-having bevelled sides 8. These 'bevelled sides co-v operate with aplate clamp. in theniform oi'' a pair oi blocks 9, 10.2 Each ,ofthese blocks is provided with a projection 11, having un-y dercut sides 12 .sa-M113. The vsides 13 cooperatewiththe bevelled edges 141 ott the main plates and vthe sides.12 co-operate'with the 'bevelled edges 8 of the projection 7 on the supplemental plate so that .when the. blocks are moved to locking-'position the main plates andthe supplemental plate are ,firmly locked simultaneously in position.

The means for operating the` blocks for..

thus locking the plates may be varied as desired. In the Aparticular construction shownV the blocks slide in grooves 15 cut inthe cylinder and are .moved to locking position by means of bars 16 and 17, `the latter being threaded through anouter clamp 18 by which the outside edges ofthe main plates.

are locked up, this bar .17 having a. squared end 19 by which it may be turned.

Means are also provided so that when the .plates are tobe. unlocked the supplemental plate will be freed from the locking blocks.-

In the particular construction lillustrated for effecting this, these-blocks are shown as hollow and connected by abolt 21 having a shank about which is ar coiled spring 22. As the blocks are .moved to locking position this spring is put yunder tension, .and when the bar 17 is manipulated to unlock the.

platesthis spring forces the blocks apart l. and. permitsthe supplemental plate to be freedfrom the locking projections of the blocks and readily takenoff .the cylinder.

Under some circumstances it may be desired to increase the .printing surface of the.

main plates and to decrease the width of the supplemental plate so that a narrow-y ker margin may be provided in which the.` matter carriedy by the supplemental plate is. printed. 'Whenthis is desired a construe-l. tion-such as illustrated in Fig. 1 may be provided. As there y'shown thetwo main plates are provided with extensions .28 and 2,41," which extend .across a. portion ofthe'l usual margin space and the supplemental plate 6 is provided with a correspondingly narrowed or restricted printing'surface. In this latter construction, however, the parts are formed and the plates locked up as heretofore described, and this description need not again be repeated.

In Figs. 5 to- 8 a somewhat modified construction for securing the supplemental plate in the margin space is illustrated. In this construction vthe supplemental plateis .cast with a flange or projection 25,:1this lange extending circumferentially of the plate, clear space 26 being left on each side of this flange for a portion'of the widthofl the plate. At suitable intervals this flange is widened,` as indicated at 27, and these widenedv portions'aref'formed with` ibevelled i sides, indicated at 28. These .bevelled .sides are arranged to take into a groove 294 having` correspondingly" bevelled sides 30 formed in blocks` 81, a. suitable' number of these blocks .being provided aroundythe cylinder. `TWhen thisconstruction is employed the plate is locked in.position'.circumfer-4 .entiallybtthe cylinder byplacing it in the position shown in Fig. 5 .in which'the narrow part ofthe projection. 25 will. lie .inthe groove of the blockand then rotating. 'the plateto the position.' in Fig. 6, this. notation; `bringing the thickened portions 01 the projection 28 inunder the sides of the'groove in the block.A With this'construction, therefore, the platel maybe readilyl placed yin and .removed from its printing position .ons

the cylinder.

The blocks 31 are movabley lengthwise of the cylinder tol lock .upthe vtwo. main plates, thisy movementof the blocks. being effected in any suitable manner,as-or..instance,-by`

the rod kconstruction illustrated in Fig. 1..

- lVithy the construction, illustrated .and described a very simple` construction has `been provided.. for utilizing they manginal space between two printing plates foryprinting. and. .one iinV which. ithe' mainplatesmay' be formed as usual, if desired, and the-supplementalplate isvreadily-placed on -.and removed from the cylinder4 and..-locked -in printin position.

f. Alhile a .preferred form of the iinvention isy that illustrated and; described, its'. will-.be

f understood that .certain changes. and variations ymay be .made inthe7 specificfstructure and arrangement, .and .thatithe .inventionisz not vto belimited to this. .IWhat I .claim is: 1'. `In amarginalprinting vrnechanismthe combina-tionwith Va iplatesupportiof a .main

.printing f plate'....mounted. :thereon so.- as.. to

leave amargin space at oneendof the plate,

and ai supplement printing plate r secured on the support and having an unbroken .printing surface forvprinting in the' margin.spacey at the end of the main `plate.

2. In a marginal printing mechanism, the combination with a plate support, of a pair of main printing plates mounted on the support so as to leave a` margin space between the plates, and a supplemental printing plate secured on the support and in the margin space between the plates and having an unbroken printing surface.

3. In a marginal printing mechanism, the combination with a plate support, ot a pair of main printing plates on -the support arranged end to end with a margin space between, means for locking the plates on the support, a narrower supplemental printing plate in the margin space between the plates, and means for locking the supplemental plate in position on the support.

ll. In a. marginal printing mechanism, the con'ibination with a plate support, of a pair of main printing plates on the support arranged with a margin space between, a narrower supplemental printing plate in the margin space provided with a downwardly extending projection having bevelled sides, and a clamping device provided with projections having bevelled sides co-operating with the sides of the plate for locking the plate in position on the support.

5. In a marginal printing mechanism, the combination with a plate support, of a pair of printing plates on the support arranged end to end with a margin space between, a narrower supplemental printing plate in the margin space, sliding blocks having holding projections under which take projections on the supplemental plate, means for effecting a sidewise locking movement of the blocks, and means for separating the blocks to free the narrow plate when the sidewise locking means are released.

6. In a marginal printing mechanism, the combination with a plate support, of a pair of printing plates on the support arranged end to end with a margin space between, a narrower supplemental printing plate in the margin space, sliding blocks having holding projections under which talle projections on the supplemental pla-te, means for etecting a sidewise locking movement ot the blocks, and a spring for separating the blocks.

7. The combination with a plate support, of three plates arranged in line across the support, a pair of clamping blocks for the middle plate, means :tor effecting a sidewise locking movement of the blocks, and means for separating the blocks to free the center plates when the sidewise locking means are released.

8. In a marginal printing mechanism, the combination with a plate support, of a pair of printing plates on the support arranged end to end with a margin space between, a narrower supplemental printing plate in the margin space and provided with a projecting portion having bevelled sides, a clamping device having projections engaging the main plates and the bevelled sides of the projection of the narrow plate, and means for et- `liecting a sidewise movement of the clamping device to lock the plates in position.

9. In a marginal printing mechanism, the combination with a plate support, of a pair of printing plates on the support arranged end to end with a margin space between, a narrow supplemental plate filling the margin space between the plates, and means for simultaneously locking up the plates.

In testimony whereof, I have hereunto set my hand.

LOUIS A. SCHMIDT. 

